mysql mha vip 不漂移_MHA高可用之VIP漂移

1.VIP漂移的两种方式

1.keeplaived的方式

2.MHA自带的脚本进行VIP漂移

2.配置MHA读取VIP漂移脚本

#编辑配置文件

[root@db03 ~]# vim /service/mha/app1.cnf

#在[server default]标签下添加

[server default]

#使用MHA自带脚本

master_ip_failover_script=/service/mha/master_ip_failover

3.编写脚本

# 默认脚本存放在

[root@db01 ~]# ll mha4mysql-manager-0.56/samples/scripts/

total 32

-rwxr-xr-x 1 4984 users 3648 Apr 1 2014 master_ip_failover

# 上传现成的脚本

# 编辑脚本

[root@db03 mha]# vim master_ip_failover

.......

my $vip = '172.16.1.50/24';

my $key = '1';

my $ssh_start_vip = "/sbin/ifconfig eth1:$key $vip";

my $ssh_stop_vip = "/sbin/ifconfig eth1:$key down";

......

4.手动绑定VIP

[root@db01 ~]# ifconfig eth1:1 172.16.1.50/24

[root@db01 ~]# ip a

3: eth1: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link/ether 00:0c:29:2c:76:88 brd ff:ff:ff:ff:ff:ff

inet 172.16.1.51/24 brd 172.16.1.255 scope global noprefixroute eth1

valid_lft forever preferred_lft forever

inet 172.16.1.50/24 brd 172.16.1.255 scope global secondary eth1:1

# 解绑VIP

[root@db01 ~]# ifconfig eth1:1 [172.16.1.50] down

#### 5.重启MHA

# 检测主从

[root@db03 ~]# masterha_check_repl --conf=/service/mha/app1.cnf

MySQL Replication Health is OK.

# 启动MHA

[root@db03 mha]# nohup masterha_manager --conf=/service/mha/app1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /service/mha/manager.log 2>&1 &

#启动失败：

1.检查配置文件语法是否正确

2.授权是否正确

[root@db03 mha]# chmod 755 master_ip_failover

3.脚本格式要正确

[root@db03 mha]# dos2unix master_ip_failover

dos2unix: converting file master_ip_failover to Unix format ...

6.测试VIP漂移

#停止主库

[root@db01 ~]# systemctl stop mysqld.service

#查看切换成主库的ip地址

[root@db02 ~]# ip a

3: eth1: mtu 1500 qdisc pfifo_fast state UP group default qlen 1000

link/ether 00:0c:29:3e:56:1f brd ff:ff:ff:ff:ff:ff

inet 172.16.1.52/24 brd 172.16.1.255 scope global noprefixroute eth1

valid_lft forever preferred_lft forever

inet 172.16.1.50/24 brd 172.16.1.255 scope global secondary eth1:1

valid_lft forever preferred_lft forever

inet6 fe80::de8c:34e1:563e:9f2b/64 scope link tentative noprefixroute dadfailed

valid_lft forever preferred_lft forever

inet6 fe80::a3a8:499:ce26:b3be/64 scope link noprefixroute

valid_lft forever preferred_lft forever